Lenovo ThinkCentre M92 Hardware Maintenance Manual (HMM) (May 2012) - ThinkCen - Page 143

Replacing the cover presence switch

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8. Insert the connector and cable of the new thermal sensor into the lower hole 1 in the chassis. Then align the two tabs on the plastic holder holding the thermal sensor with the two holes 1 and 2 in the chassis, and push the plastic holder until it snaps into position. Figure 71. Installing the new thermal sensor 9. Reconnect the thermal sensor cable to the system board. See "Locating parts on the system board" on page 75. 10. Reinstall the front bezel. See "Removing and reinstalling the front bezel" on page 95. What to do next: • To work with another piece of hardware, go to the appropriate section. • To complete the installation or replacement, go to "Completing the parts replacement" on page 150. Replacing the cover presence switch Attention: Do not open your computer or attempt any repair before reading and understanding the "Important safety information" on page 1. This section provides instructions on how to replace the cover presence switch (intrusion switch). To replace the cover presence switch, do the following: 1. Turn off the computer and disconnect all power cords from electrical outlets. 2. Remove the computer cover. See "Removing the computer cover" on page 94. 3. Remove the front bezel. See "Removing and reinstalling the front bezel" on page 95. 4. Locate the cover presence switch. See "Locating major FRUs and CRUs" on page 73. 5. Disconnect the cover presence switch cable from the cover presence switch connector on the system board. See "Locating parts on the system board" on page 75. Chapter 9. Replacing FRUs (machine types: 2697, 2698, 2742, 2750, 2935, 2943, 2960, 2967, 2986, 2992, 2994, 2999, 3182, 3184, 3186, 3190, 3201, 3204, 3208, 3212, 3217, 3220, 3226, 3228, 3302, 3391, and 3392) 137

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8. Insert the connector and cable of the new thermal sensor into the lower hole
1
in the chassis. Then
align the two tabs on the plastic holder holding the thermal sensor with the two holes
1
and
2
in the
chassis, and push the plastic holder until it snaps into position.
Figure 71. Installing the new thermal sensor
9. Reconnect the thermal sensor cable to the system board. See “Locating parts on the system board”
on page 75.
10. Reinstall the front bezel. See “Removing and reinstalling the front bezel” on page 95.
What to do next:
•
To work with another piece of hardware, go to the appropriate section.
•
To complete the installation or replacement, go to “Completing the parts replacement” on page 150.
Replacing the cover presence switch
Attention:
Do not open your computer or attempt any repair before reading and understanding the “Important
safety information” on page 1.
This section provides instructions on how to replace the cover presence switch (intrusion switch).
To replace the cover presence switch, do the following:
1. Turn off the computer and disconnect all power cords from electrical outlets.
2. Remove the computer cover. See “Removing the computer cover” on page 94.
3. Remove the front bezel. See “Removing and reinstalling the front bezel” on page 95.
4. Locate the cover presence switch. See “Locating major FRUs and CRUs” on page 73.
5. Disconnect the cover presence switch cable from the cover presence switch connector on the system
board. See “Locating parts on the system board” on page 75.
Chapter 9
.
Replacing FRUs (machine types: 2697, 2698, 2742, 2750, 2935, 2943, 2960, 2967, 2986, 2992, 2994, 2999, 3182,
3184, 3186, 3190, 3201, 3204, 3208, 3212, 3217, 3220, 3226, 3228, 3302, 3391, and 3392)
137